Ah, but there are converse instances where one is repeatedly abusive and insulting, repeatedly getting threads closed, but then pretends to be so awesome and act soooo innocent. Others should be able to see the offensive actions, to understand why they eventually get banned. I can cite a specific cases, where the "innocent" person's instigative/insulting and unprovoked posts have all been removed, either individual posts, or entire threads. That is wrong.
I am not a golden child, and have posted my share of regretable things. But, I'll own up to my behaviour both good and bad.
My philosophy is that one "lives and dies" by their posts, and deleting posts or threads is an injustice to the community as a whole.